222             png_error(png_ptr, png_ptr->zstream.msg);  in png_text_compress()
224             png_error(png_ptr, "zlib error");  in png_text_compress()
321             png_error(png_ptr, png_ptr->zstream.msg);  in png_text_compress()
323             png_error(png_ptr, "zlib error");  in png_text_compress()
397             default: png_error(png_ptr,"Invalid bit depth for grayscale image");  in png_write_IHDR()
402             png_error(png_ptr, "Invalid bit depth for RGB image");  in png_write_IHDR()
412             default: png_error(png_ptr, "Invalid bit depth for paletted image");  in png_write_IHDR()
417             png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");  in png_write_IHDR()
422             png_error(png_ptr, "Invalid bit depth for RGBA image");  in png_write_IHDR()
426          png_error(png_ptr, "Invalid image color type specified");  in png_write_IHDR()
529        png_error(png_ptr, "zlib failed to initialize compressor");  in png_write_IHDR()
562         png_error(png_ptr, "Invalid number of colors in palette");  in png_write_PLTE()
649          png_error(png_ptr,  in png_write_IDAT()
1914             png_error(png_ptr, png_ptr->zstream.msg);  in png_write_finish_row()
1916             png_error(png_ptr, "zlib error");  in png_write_finish_row()
2743             png_error(png_ptr, png_ptr->zstream.msg);  in png_write_filtered_row()
2745             png_error(png_ptr, "zlib error");  in png_write_filtered_row()